Physics Circular Motion?

Question

A cord holding a .4 kg ball will break if the tension exceeds 60 Newtons. How fast can the ball travel in a horizontal circle if the length of the cord is 1.3 meters?

Answer 1

Tension force

F = m v^2 / r

Speed

v = sqrt(F r / m)

v = sqrt(60*1.3/0.4) = 13.96 m/s